Self-locking valve-lifter for automobile-engines.



G. W. GARWOOD.

SELF LOCKING VALVE L'IFTER FOR AUTOMOBILE ENGINES.

APPLICATIUN FILED JULY I9, I9|5 4 1 ,1 88,357.' Patented June 20, 1916.

mi CO., WASHINGTON D c narran srafrnegrm' www@ GEORGE wENDALL eanwoon,

or En MONT/E, CALIFORNIA.

SELF-'LOCKING VALVELIFTER FOR AUTOMOBILE-ENGINES.

Specification of Letters Patent. Patente 'Jung 20, 19155,

Application ales July le, 1915. serial No. 40,574.

. Self-Locking Valve-Lifters for Automobile KK ce Engines, of which the following is a specification. y

My invention relates to a self locking valve lifter for automobile engines.

As well known the valves ofthe internal combustion engine of an automobile need regrinding from time to time. In order to remove the valves for this purpose the cylinder head of the engine is removed and Va valve lifting tool engaging the valve spring seat of the valve is applied lifting the seat against the tension of the spring.

Y rfhe valve seat pin is now pulled out and the valve itself is removed by the head preparatory to grinding. c i

In the valve lifting tools hitherto in use .it is necessary to keep one hand on the tool 1n order to maintain the valve spring in its compressed position while the valve seat pin is relnoved. y

It is an object of this invention to devise a valve lifting tool simple'of construction, which after raising the valve spring willbecome locked, and which will. maintain the valve spring in its compressed conditionallowing both hands of vthe operator to be employed in removing the valve seat pin, and

1 the valve itself, and which can be instantly released or unlocked.

My invention conslsts of the construction and arrangement of parts hereinafter described and claimed.

In the accompanying drawings, which form a part of this specification, I have illustrated a practical and convenient embodiment of my invention, and in which, Y

Figure 1, shows an end view of an alltomobile engine with its cylinder head removed showing the application of the self locking valve lifter to a valve to be removed. Fig. 2, shows a side elevation of the device. Fig. 3, shows a top plan View.

designates an automobile engine with the cylinder head removed.

11 is a valve held normally against its seat by coiled spring 12, the lower part of which engages the valve spring seat 13 normally engaging valve seat pin 14.

The self locking valve lifter applied to said valve consists of the horizontal bar 15,

which at its forward end projects dowllwardly, and again horizontally, the eXtreme forward end thereof being forked and. semicircular in shape. The object of making the forward end forked is to allowthe same to 1 straddle the head of the valve which is to be removed. viipproxim'ately mid-way between the ends of bar- 15an upwardly extending vertical link 16 is pivoted. This link is forked atfboth ends, the lower end beingsecured by a pin 17 extending transversely through bar 15, and through the forked ends of said link. A lever 18 extending in horizontal and parallel relation to bar 15 is pivoted to the vertical link 16 and a pin.y

19 passing transversely through said lever,

,and through the upper forked end of link 16. At the forward end of the lever a valve seat engaging member 2O is pivoted and extends y through a bore 21 in bar 15. This bore is substantially mid-way between the forward end of bar'15 and pin 17. rIhe shape of the valve seat engaging member and bore 21 is preferably` cylindrical. In order to inv crease tllebearing surface of bore 21 in which said member is slidably mounted, a

boss 22 extends for a slight distance from bar 15. The upperend of said member `is secured to lever 18 by apin 23 securing` the` forked end of the lever to the upper'end of saidmember. The lower end of said meinber `extends at right angles in a horizontal direction forwardly thereof, and is provided with a forkedvend adapted to engage the circular spring 'seat Vof the valve..

From the foregoing description the operation of my improvedA valve lifter will be easily understood. In Fig. 1, the same is shown as applied to valve 11. The end'of the horizontal bar 15 is placed on the top of the engine, the cylinder head having been removed, as shown in Fig. 1, in such a position that the head of valve 11 will be situated within the forked end thereof and spaced therefrom so that the Valve may be lifted out Vwithout interference therewith. The forked end of valve liftingkmember 20 is inserted between the valve seat 13 and valve seat prin 14. Pressing on the outer end of lever 18 downwardly will raise the valve lifting member pivoted to the forward .end thereof. The strain on the forward end of the valve lifting member exerted thereon by the valve spring 12 will cause the same downwardly therefrom passing,l

to be moved outwardly to a slight degree as shown by the dotted lines in Fig. 2. VThe lower end of said member is moved outwardly, the upper end above the bore 22 will move inwardly causing that portion of the member situated within bore 22 to bind or lock, the locking action taking" place between the valve lifting member within the bore and the lower and outer wall at the point a and at point bdianietrically opposite from point a at the upper and forward end of the bore 21 whereby the valve lifting member 20 will be held stationary or locked in its valve lifting position. Both hands of the operator are now free to remove valve seat pin 14C and to lift valve 11 from its seat. rIhe link 16 is pivoted at both ends in order to allow the upper end of link 16 to move slightly forward, rocking on pin 17. Bar 15 has a downward eXtension'at its forward end in order to clear the intake and exhaust manifolds of the engine, (not shown.)

I/Vhen it is desired to release or unlock the valve lifting device it is only necessary to hold bar 15 stationary and to strike the vertical'valve liftinginember a slight blow at a point below bore 22 in a direction toward the valve seat. This blow will move the upright portion of member 20 in a true vertical position and release the portion within bore 21 at places a and where the saine is bound and gripped. The tension of spring 12 will move valve lifting member 2O downward whereby the device is unlocked and ready to be applied to another valve. It is not necessary that boro 22 and the valve lifting member form a tight joint. The device will operate even after long usage when said joint is 'worn and has a good deal of lost motion.

I claim: n

1. In a self locking valve lifter for automobile engines, the combination of a -liorizontal bar provided with a forked end, and

`engage the spring seat of the engine valve.

2. In a self locking valve lifter for automobile engines, the combination of a horizontal bar having a front end adapted to engage tlie upper part of an automobile engine, a vertical link pivoted at its lower end .to said bar ata point intermediate the ends thereof, said bar having a vertical bore be ,tween its forward end and said link, a lever fulcrumed to the upper end of said link at Va point intermediate the ends of said lever,

and a downwardly extending valve lifting member pivoted at its upper end to the forward end of said lever, said member being slidably mounted in said bore and adapted to engage with its forward end the spring seat of the engine valve.

3. In a self locking valve lifter for automobile engines, the combination of a horizontal bar adapted to engage the engine at a point above the valve spring seat, a lever extending in horizontal and parallel relation to said bar, a pivotal connection between said bar and said lever, said bar having a vertical bore between its forward 'end and said connection, a valve lifting member pivoted at its upper end to said lever and slidably mounted in said bore, the lower end of said member being adapted to engage tiie spring seat of the engine valve.

In testimony whereof I have signed my name to this specification.

GEORGE VVENDALL GARIVGOD.

Gopieri of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, 1D. C." 

